Dyeing and printing



Fetenteel Oct. 6, 193i IVOE MORGAII J AND WILLIAM. 'ZZIJBY, C-FLANCASTER, ENGLAND, ASSIGNORSTG SCGTTISH DYES, LIMITEDfOF GRANGEMOUTH,SCOTLAND DYEING AND PRINTING No Drawing". Application filed June 27,1927, $eria1 No. 201,959, and in Great Britain June 28, 1926.

'5 connection with these processes.

The invention consists in a process for the production of dyed productsby means of soluble ester derivatives of reduced vat dye-V stufis whicheliminate the use of vats according to which process dyeing is effectedby padding and the material is steamed without drying after the paddingprocess, the steamed material being subsequently entered into adevelopment bath.

The invention also consists in a process which comprises the padding ofsoluble ester derivatives of leuco vat dyestuffs on to textile fibres,particularly such derivatives as M may be prepared by processes of thekind in dicated in the specifications referred to above, together withan oxidizing agent which is substantially inactive under the conditionsof steaming,then freeing the padded goods from superfluous liquor andWithout drying, steaming the goods, treating them in a developing bath,rinsing and, if desired, soaping.

The invention also consists in a modification of the process accordingto the preceding paragraph in which an acid oxidizing agent is added tothe developing bath instead of to the padding bath.

The invention further consists in a process as indicated in any of thepreceding three paragraphs which includes the employment in the processof emulsifying or dispersing agents such as soluble oil or the like,soda ash or other weak alkali or Monopole soap, either as an addition tothe padding liquor or by treating therewith clothor the is tobe padded.

The invention further consists in processes for the dyeing of materialssubstantially as hereinafter described and in dyed products whenprepared by those processes or by the obvious chemical equivalentsthereof.

The following examples illustrate how the invention may be carried intoeffect, all parts being parts by Weight:

like which Ewample 1 The'cloth is padded on a padding mangle at 95 C.with a solution made as follows Parts by weight Soledon jade green(commercial paste) 105 Sodium nitrite; 1 6% gum dragon;thickening i 8Soluble oil 1 Water to 100 After removal ofsuperfiuous liquor it is thensteamed without drying for 10 minutes in an ordinary Mather & Plattsteamer, and developed in an open width soaping machine by passingthrough 1 per cent. sulphuric acid, then rinsing and soaping.

I E sample 2 The cloth is padded on a padding mangle at 95 C. with asolution made up as follows':

Parts by weight Soledon yellow; 10 6 gum dragon thickening 8 Soda ash 1Water up to 100 It is then steamed without drying for 10 minutes in anordinary Mather & Platt steamer and'developed in an open width soaps ingmachine bypassing through 1 per cent. sulphuric acid containing 1 percent. of hi chromate of soda at 7 0 C. then rinsing and soaping. I a

Eazcmtple 3 The cloth is padded on a padding mangle at 85 C. with asolution made as follows Parts by weight Indi 'osol pink HR 5 6% gumdragon thickening 5 Soluble Oll 2 Sodium nitrite 1 ater to 100 It isfinally treated as in Example 1.

Example 4 The cloth is padded on a padding mangle at C. wlth a solutionmade up of Parts by weight Indigosol O l-B 5 6% gum dragon thickening 5Soluble oil 2 Sodium nitrite 1 ater up to 100 The cloth is then steamedwithout drying and developed as in Example 1.

Example 5 Dyestuflf paste.-. 50, 10 200. 300, Soluble oil 7.5, 10. 12.5.15, Sodium 111' e- 10, 1O, 10, 10, 0% gum d on thick 111g 8, 8, S. 8, S,8 parts Watcrto n 1000, 1000, 1000, 1000, 1000, 1000 The cloth is thensteamed without drying and the colour develoned as in Exam )le 1.

General Since the products referred to as used for dyeing arecomparatively new thetollowing information is given concerning them (a)Soledon jade green (Scottish Dyes, Limited) appears to be a sodium saltof a sulphuric acid ester prepared from Caledon jade green (colour index1101.)

(Z2) Soledon yellow (Scottish Dyes, Limited) is apparently the sodiumsalt of a sulphuric acid ester prepared from Caledon yellow G. (colourindex 1118.)

(0) Indigosol pink HR. (Durand and Huguenin) is probably a sulphuricacid ester prepared from Helindone pink R. (colour index, commercialname index).

((Z) Indigosol 4B (Durand and Huguenin) is probably the disulphuric acidester of indigo MLB/lB. (colour index 1184).

Having now described our invent-ion, what we claim as new and desire tosecure by Letters Patent is 1. The process which comprises the paddingof: soluble ester derivatives of leuco vat dyestuffs onto textile fibrestogether with an oxidizing agent which is substantially in active underthe conditions of steaming, then freeing the padded goods fromsuperl'luous liquor and nez; without drying, steaming "the goodssubsequently treating them in a developing bath and rinsing.

:2. A process for the production of dyed products by means of solubleester derivativcs of reduced vat dyestuffs which eliminate the use ofvats which consists in padding the aforesaid derivatives on to thematerial to be dyed, steaming the material without an intermediatedrying stage and subsequently developing the colour on the steamedmaterial.

3. A process as claimed in claim 2 which consists in carrying into ei'lect the padding process in the presence or a dispersing agent.

In testimony whereoi we have signed our names to this specification.

JAli lES IVOR MORGAN JONES. lVILLLili i KILBY.

